RRB Prep Tamil is a free educational app developed by Sana Edutech to help students prepare for the RRB NTPC (Non-Technical Popular Categories) exam in Tamil. The app provides more than 2000 multiple-choice questions in Tamil, covering the syllabus of the exam. It also includes model question papers, syllabus details, and notification updates for the exam.

The app offers six sections covering General Awareness, Arithmetic, Technical Ability, Reasoning Ability, General Intelligence, and Language Ability in English. The questions are presented in a quiz format, allowing users to test themselves in practice mode (no time limit) or timed mode quiz. The app has a fast user interface without any lag or delays, and the zoom option helps users read the text and questions easily. The app also has a speech read-out feature that reads out the questions for users and provides detailed reports on total questions answered, marks, and mistakes stored.